I rarely use sensational headlines but this one deserves the term, “deadly.” The U.S. Centers for Disease Control and Prevention (CDC) today issued an alert on a peculiar cluster of designer drug overdose deaths that will appear in tomorrow’s August 30th issue of Morbidity and Mortality Weekly Report (MMWR). In March and early April this year, Rhode Island public health officials noted an unusually high number of drug overdose deaths, with 21 cases in one month relative to an average of nine.